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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang tries to match exception specification for an explictly defaulted but implicitly deleted function"
href="http://llvm.org/bugs/show_bug.cgi?id=18662">18662</a>
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<th>Summary</th>
<td>clang tries to match exception specification for an explictly defaulted but implicitly deleted function
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>st@quanttec.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following example seems to fail to compile because clang tries to match the
exception specification for the explicitly defaulted but implicitly deleted
move assignment operator of Wrapper with a bogus exception specification it
calculated for the implicitly deleted function.
--
class Value {
public:
Value();
Value& operator=(const Value& other);
Value& operator=(Value&& other) noexcept;
};
template <typename T>
struct Wrapper {
T value;
Wrapper& operator=(const Wrapper&) = default;
Wrapper& operator=(Wrapper&&) noexcept = default;
};
Wrapper<const Value> value;
--
lang++ -std=c++11 test.cpp
test.cpp:13:13: error: exception specification of explicitly defaulted move
assignment operator does not match the calculated one
Wrapper& operator=(Wrapper&&) noexcept = default;
^
test.cpp:16:22: note: in instantiation of template class 'Wrapper<const Value>'
requested here
Wrapper<const Value> value;
^
1 error generated.</pre>
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